Thermosensitive recording medium
A thermosensitive recording medium including a support, and at least one layer provided on the support, wherein one of the at least one layer is a thermosensitive layer capable of forming a color image when heated imagewise, and one of the at least one layer contains a zinc dithiocarbamate of the formula: ##STR1## wherein R.sup.1 and R.sup.2 stand independently from each other for an alkyl group having 1-4 carbon atoms or a phenyl group. The zinc dithiocarbamate is contained in the thermosensitive layer or an intermediate layer interposed between the thermosensitive layer and the support.
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Claims
1. A thermosensitive recording medium comprising a support, and a thermosensitive layer provided on said support and capable of forming a color image when heating imagewise, said thermosensitive layer containing a zinc dithiocarbamate of the formula: ##STR5## wherein R.sup.1 is a phenyl group and R.sup.2 is an ethyl group.
2. A thermosensitive recording medium comprising a support, a thermosensitive layer provided on said support and capable of forming a color image when heated imagewise, and an intermediate layer interposed between said support and said thermosensitive layer and containing a zinc dithiocarbamate of the formula: ##STR6## wherein R1 and R2 are independently selected from the group consisting of alkyl groups having 1-4 carbon atoms and a phenyl group.
3. A thermosensitive recording medium as claimed in claim 2, wherein R.sup.1 is a phenyl group and R.sup.2 is an ethyl group.
4. A thermosensitive recording medium as claimed in claim 2, wherein R.sup.1 and R.sup.2 are each a methyl group.
5. A thermosensitive recording medium as claimed in claim 2, wherein said intermediate layer additionally contains a filler having an average particle diameter of 2-10.mu.m and formed of hollow plastic particles each having an inside diameter which is at least 90% of the outer diameter thereof.
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Type: Grant
Filed: Jul 2, 1996
Date of Patent: Feb 24, 1998
Assignee: Ricoh Company, Ltd. (Tokyo)
Inventors: Shuji Miyamoto (Numazu), Yasutomo Mori (Numazu), Takeshi Akimoto (Numazu)
Primary Examiner: Bruce H. Hess
Law Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Application Number: 8/674,678
International Classification: B41M 530;
